Rotary well drill



. s. BURTON v I ROTARY WELL DRILL Filed May a, 1924 2 Shee ts Shet 1 \lillllil Patented Apri 28,

UNITED STATES f NELSOZN s. nnnron, 6r Anmvronn, oKLAnoMA.

PATENT! OFF! no'rAnY WELL DRILL.

- Application filed m 8,

1 To all whom. itma'j/ concern:

Be it known that-ll, NELSON S, BURTON,

a citizen of the United States, residing at Ardmore, in the county of Carter and State of Oklahoma, have invented certain new and useful Improvements in'Rotary Well Drills,

of which the following is a specification, refto provide an improved construction and mounting. for the reamer embodying means whereby, circulation of water may be properly fedtothe blades of the reamer and whereby the reamer' is conveniently supported at a point spaced above the last joint of the tool line, permitting this jointed tool line to be operating in an opening slightly larger than the joint so that it will be maintained in alignment and guide the reamer properly in the formation of the larger or casing receivingbore. j

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein .Figure 1 is a side elevation showing a reamerconstructed in accordance withmy invention Figure 1 is a reduced side view showingthe entire drilling assemblage;

Figure 2' is a view similar to that shown in Figure 1 but taken at right angles thereto; Figure 3 is a vertical sectional view through the reamer;

Figure 4 is a section through the upper end of the reamer;

Figure 5 is a section taken approximately midway between the ends of the reamer.

Referring now more particularly to the drawings, the lower end of the drill pipe is provided with an enlarged double pin tool joint 10., the larger or upper pin 11 thereof fitting the lOOX at. the upper end of a sleeve 12, while the lower or smaller pin 13 thereof 1924. Serial No. 711,874.

fits the shank of a double box tool-joint 114c which is ofthe usual construction with the exception of the fact that it tis made some-- what longer than those ordinarily employed.

This tool joint 10 has. a central bore 15 which is in communication through downwardly inclining ports 16 with the outer-enrfaoe of the sleeve immediately in advanceiof vertical reamer blades 17 formed uponf'the sleeve; Thisbore 15 is also in communieag tion with further ports 18 which commuiiicate with longitudinally extending portsjl9 of the sleeve which open through the-bottom of the sleeve immediatelyin advance-Eithe lower ends of these blades which arecb'ntinned below the under end of the sleeve and have extensions 20 underlying and'jointed to the sleeve. The rear faces of these blades at their lower ends will be beveled, as at 21, in the usual manner and the blades are pref: erably provided upon their outer surface with the usual decrease in thickness for the purpose of providlng clearance.

is in position. within the bore. two depths ofwater will be applied to the front faceof the reamer blades, one to the front edge of the blade adjacent the upper end thereof and directed downwardly along this edgeand the 81 other opening directly to the cutting portion proper of the blade at the lower end thereof.

By this arrangement proper cooling of the blades and removal therefrom of sticky sedi- 90 ment is assured.

The sleeve 12 has a bore 23 snugly receiving the drill joint 14 so that proper alignment of the sleeve and drill joint are obtained. The lower end of this drill joint will preferably have applied thereto a fish tail 5 bit 24 of any desired construction. This tool. joint has, of course, the usual central water course 25 communicating with gthe gwateru f ports of the fish tail bit. It will-he -obvious that when it is necessary to sharpen.;either the blades of the reamer or the fishtail bit, it may be accomplished by withdrawing the drill pipe and removing thegitool'whioh it is desired to employ. In the construction of the joint 25'care is takenthat the wrench mm square 26" thereof is disposed beneath the lower end of the reamer so that it is readil accessible for removal as a unit with the fis tail bit or for-holding while the fish tail bit is removed,

Many changes and modifications of the structure hereinbefore recited being possible It is seen that when'a reamer of this type gaging surface of the sleeve.

2. In well drilling apparatus and in combination, a tool joint having a double pin at its lower end, a drill joint engaging the smaller pin of the tool joint, a sleeve engaging the larger pin of the tool joint, a bit engaged with the lower end of the drill joint, and reamer blades formed on the outer surface of the sleeve, said tool joint having a longitudinal waiterport, the drill joint having a similar port communicating with the water port of the tool joint, the sleeve having longitudinally extending ports for delivering fluid to said reamer blades, the

'ports of the sleeve communicating through the wall of the pin engaged by the sleeve with the port of said tool joint.

3 In combination with a drill pipe including a tool joint disposed of above the lower end thereof and having a pin, a reamer comprising a sleeve surrounding the drill pipe, and havin a boxat its upper end for engagement with the pin of the tool joint, longitudinally extending blades secured'to the outer surface of the sleeve and extending therebelow, the ends of the blades being extended beneath the lower end of the sleeve, the sleeve having a longitudinal port connecting said box with the lower end of the sleeve immediately in advance of the front face of each of said reamer blades.

4. In combination with a drill pipe including a tool joint disposed of above the lower endxthereof and having a pin, a reamer comprising a sleeve surrounding the drill pipe, and having a box at its upper end for engagement with the pin of the tool joint, longitudinally extending blades secured to the outer surface of the sleeve and extending therebelow, the ends of the blades being extended beneath the lower end of the sleeve, the sleeve having a longitudinal port connecting said box with the lower end of the sleeve immediately in advance of the front face of each of said reamer blades,-

and other ports connecting said box with the outersurface of the sleeve adjacent the upper ends of said reamer blades.

5. In well drilling apparatus and in combination, a tool joint having adouble pin at its lower end, a drill joint engaging the smaller pin of the tool joint, a sleeve en gaging the larger pin of the tool joint, a bit engaged with the lower end of the drill joint, and reamer blades formed on the outer surface of the sleeve, said drill joint being provided with a wrench square spaced from the upper end thereof a distance greater than the length of said sleeve.

In testimony whereof I hereunto aflix my signature.

NELSON s. BURTON. 

